But Geoana's Social Democratic Party said it had proof of fraud and would contest the result.

One of the practices it complains of is "electoral tourism," in which individuals vote in more than one polling district.

"We have proof of fraud," senior party member Liviu Dragnea told a press conference. "The exit poll, the large number of anulled votes... massive electoral tourism and other things obviously forced us to contest the result."

"Romanians voted for Mircea Geoana, but Basescu's state apparatus is trying to make him the winner through fraud," Dragnea said.

Observers' demands met

Election observers from the Organization for Security and Cooperation in Europe (OSCE) said that the election, the second round of voting in the presidential contest, had met its requirements. However, they urged authorities to investigate the complaints.

“The conduct of the second round confirms our initial assessment that this election was generally held in line with OSCE commitments,” said Vadim Zhdanovic, head of the OSCE mission.

The two contenders, both in their fifties, came out neck-and-neck in the first round of voting two weeks ago, with Basescu winning 32.44 percent of ballots and Geoana 31.15 percent.

The November 22 presidential election was the first since the country joined the European Union in 2007.

Call for urgent reforms

One of the first tasks for the new president will be to appoint a prime minister, as the country has been in the hands of a caretaker government since the fall of the coalition between Basescu's Liberal Democrat Party (PDL) and Geoana's Social Democratic Party (PSD) on October 1.

The International Monetary Fund, the European Union and the World Bank, which in March agreed on a 20-billion-euro bail-out plan for Romania, demanded that Romania take swift steps to cut public spending amid the recession.

In response, Basescu pleaded in his campaign for "accelerating reforms" to reduce public expenditures.

Although Basescu's governing PDL is somewhat isolated following the agreement between the left-wing social democrats and the liberals, he insists that the party will be able to find allies to form the future government.

On Friday, Basescu appealed to liberals for support, saying Romania needed a right-wing coalition government to "bring it out of both political and economic crisis."